Weighing in at 100+ international bitterness units and 10 percent ABV, Oskar Blues Brewery‘s GUBNA is a complex and chameleonic concoction that packs a wallop. The Granddaddy of all Oskar Blues’ hop grenades in a can, GUBNA obliterates the ordinary. If G’Knight or Deviant Dale’s seem too tame, it’s time to experience the most challenging and notorious elixir from OB’s diabolical roster of ferocious fermentables, the brewery challenges.

Every year, Oskar Blues’ eccentric fellowship of deranged brewers work with hop growers to seek out the most potent, unique and mind-bending hop varietals of the season. By annually altering the hop bill, GUBNA continually reinvents itself while letting the best and brightest of these powerful flowers flourish.

GUBNA v 4.0 is aggressively dry-hopped with the citrusy Chinook (this year’s legendary crop was especially complex), the tropical fruit and red berry notes of Mosaic, and the zesty lemon Sorachi Ace strain. Showcased on a base recipe of Rye (now double the amount previously used), North American Pale and Munich malts, these three formidable hop varieties are given free rein to assault the senses in a strangely schizophrenic symphony of bewildering bitterness, complemented perfectly by the pleasant warmth to be expected from that 10 percent booziness.

Spring’s hoppy answer to the gargantuan chocolate malt bomb Ten FIDY (OB’s infamous winter seasonal), GUBNA 2014 will be available on tap and in 12-ounce four-packs from March until May.